Gas stove



Jun'e 19., 193.4.` o. WIEDERHOLD GAS STOVE Filed April 4, 1932 /V/TNE'SS: i I M41.

' Patented June 19, 1934 infra-red or heat rays as UNITED STATES PATENT OFFICE Gas s'rovE Oscar Wiederhold, Skillman, N. I. Application April 4', 1932, serial No. 602,923

3 Claims.

The subject of my invention is a gas stove having therein a plurality of slabs of refractory material or so-called radiants which are treated with a chemical that will produce an abundance of well as an abundance of visible or light rays which assist the penetrating power of the heat rays.

Another feature of my invention is that certain of the radiants are arranged at an angle to each other or sloping with an opening between them while another radiant is mounted above this opening. The radiants are located adjacent the top of the stove so that the gases are baffled in their exit from the stove and all the smoke is consumed.

Yet another feature of my invention is the fact that the Bunsen burners are locatedadjacent the radiants so that the ame comes in close contact with chemically treated radiants so that by catalytic action all the carbon monoxide produced by the combustion of the gas is changed to carbon dioxide. y

Still another feature of my invention is to provide air inlets adjacent the Bunsen burner mixing chambers so that the secondary "air for the flames is taken from the outside of the stove to cause complete combustion.

In general it is my purpose to provide a gas stove which shall be suitable for cooking by both radiated and reected heat and especially for broiling or toasting and is useful for preparing meat, such as steaks-or chops, toasting bread, or

cooking vegetables, such as roasting potatoes.

lbe specifically pointed out and claimed.

In the drawing, Figure 1- is a side elevation of my device with parts broken away.

Figure 2 is a vertical cross section on line II-II.

of Figure 1 in the direction of the farrows.

In that embodiment of my invention selected for illustration in the drawing, my device is shown as consisting of a shell generally indicated at 1 which may conveniently be formed of sheet metal and which may have at its lower forward face an opening 2. The opening 2 may be provided with a door if so desired. The stove may be open at its top as indicated at 3 and may be provided with a grid 4 located in this opening.

At its upper end the stove is provided with a plurality of slabs 5 of refractory material known in the art as radiants. These slabs may be treated with a chemical adapted to give off an abundance of infra-red or heat rays as well as an abundance of visible or light rays when the slab is heated to incandescence. Examples of such a chemical are aluminum oxide, calcium oxide or thorium oxide. The chemical is applied to the radiant by treating the radiant or a portion of it with a 50% solution of the chemical in water. I have shown in the drawing radiants having cones 6 which are the portions chemically treated but I do not however intend to be limited to radiants of this description. Beneath the slabs'5 but adjacent thereto are located the Bunsen burners for the gaseous fuel. These burners may conveniently consist of a mixing chamber 'l located within the stove so as to be superheated. The mixing chambers? contain a plurality'of jets 8 from which the gas escapes in'ames. Beneath the jets 8 the mixing chambers may contain a wire netting or gauze 9. The Bunsen burner proper is indicated at 10 and is shown as being of the double type which cannot become heated and which-has given the best results in incandescent gas burners. A gas inlet pipe 11 is connected to the lower end of burner 10. In the side walls of stove 1 adjacent the mixing chambers 'Z I have provided a plurality of air inlet ports 12, as shown in Figure 1. There are also provided adjacent mixing chamber 'I and inlet ports 12 air bales 13 which direct the secondary air which enters through the ports 12 directly to the burner flames issuing from jets 8. It is thus noted that the secondary air for the burner flames is drawn from outside the stove and not from inside so that complete combustion of the gas is obtained. It will also be seen that the Bunsen ames come into close contact with the chemically treated radiants so that the radiants, by their catalytic action, change all the carbon monoxide resulting from the combustion of the gas into carbon dioxide. Due to the location of the mixing chambers 'I and the inlet ports 12 the burner cannot light back nor will the Bunsen flame leave the port openings.

In the lower part of my stove I may provide a plurality of shelves 14 adapted to support? a. grid 15 or a pan 16 which are useful forcooking purposes.

It will be seen from the foregoing that when it is desired to cook on the stove the gas is turned on and ignited at the jets 8. The Bunsen names play upon the adjacent radiants heating them to incandescence regardless of the variation of gas' pressure. As the radiants or deflectors are rays on the material to be cooked. Also, since the radiants are at an angle, as the heat rises, the radiants are brought'l to incandescence and are evenly heated throughout. There is provided aspace between the sloping radiants and another radiant is provided opposite thisspace which also is heated to incandescence and serves to consume any smoke caused by the cooking. This smoke being composed of incompletely burned gas and of various vapors from the cooking contains carbon. When this carbon is consumed or comes in contact with the incandescent radiant it gives oil.D ultraviolet light ,according to the well known priuciplesof the carbon arc. This ultra-violet lightl is helpful in cooking thoroughly and quickly without burning or charring the food to be cooked.

The open top 3 of the stove may be utilized for pots or pans by placing them, on the grid 4 where they may be used for cooking or may be kept warm.

Ido not intend to be limited in the practice ofmy invention save as the scope of the prior art and of the attached claims may require.

I claim: 1

l. A gas stove including in combination a shell having an open top, a Bunsen burner having 'a plurality of mixing chambers within said shell beneath said open top, a pair of slabs of refractory material located between said mixing chambers and said open` top and arranged at' with'an opening beof said slabs being an angle to each other and tween them, at least one pair of gas outlet portions projecting into saidl shell closelyadjacent the sides thereof, said gas outlet portions being locatedrelative to said slabs so as to direct the :llames issuing from said gas outlet portions upwardly along the surfaces of said slabs at an angle thereto.

3. A gas stove comprising, a shell having an open cooking top and a spaced oven compartment, a pair of refractory radiant slabs ar.

ranged at an upward opposite angle to each other and located above the oven compartment and having. a space between said radiant slabs for the escape ofthe products of combustion, a Bunsen tube having a pair ofgas burner outlet portions projecting into saidshell adjacent the sides thereof, and lsecondary air inlets located adjacent to .said burner outlet portions,

said burner outlet portions directing flames aty an angle tosaid radiant slabs.

OSCAR WIEDERHOLD. 

